The 17-year old had been away with the Malta Under-19 side for the past week, although it now appears as if he has finally linked up with the Greater Manchester club.
He netted once whilst away on international duty, scoring in the 5-0 defeat of Katane Soccer Mascalucia, and he has also netted against the Netherlands Under-17 team - scoring a consolation goal in a 5-2 defeat back in May 2014.
His reputation has grown quickly in the past months, having made his debut for Maltese club side Hibernians last month - before being rewarded with inclusion in their 18-man Europa League squad.
Bolton are the first team to have made a move for the talented youngster, although sl10.ng is reporting that Italian club Catania, as well as an unnamed Dutch side, are also keeping tabs on the player.
When quizzed by journalists following his first day of trials, Mbong gave a glowing review of how he had been treated, hinting at a desire to stay with the Trotters.
The youngster said: "They have treated me professionally since I came here. I enjoyed the first day of training since it's different from what I experience in Malta.
“The football I played yesterday was much more rapid and there was a lot of contact. It was a hard day but I'll get used to it.
"I wasn't treated like a stranger by the players I met. They all asked my name, guided me through training and all that.”
Mbong is set to remain with Bolton for a further six days, with the club keen to asses all their options before deciding whether to offer the forward a professional contract. There is a strong likelihood that the youngster may feature in the Trotters’ Development Squad fixture against West Brom on Monday 15.